The wire breaks and you cannot open to access the engine

 

Get a regular steel wire and attach it to the locking arm for the bonnet. Then just let it run where it does not disturb anything. I have my emergency wire as in the photo. At the brake reservoir I have a loop. The bonnet is very flexible and easy to raise enough to let your finger grab the wire. Just pull a bit and the bonnet will open.

 

A piece of cake. Don't make things too complicated.

 

 

 

Here's how I opened a bonnet on a 1750 GTV. Use a piece of wood and a cloth, the latter to protect the paint. Raise the bonnet at the edge, it is very flexible and easy to raise.

 

 

Then raise the hood so you can see through, use a torch so you can see the mechanism.

 

I used a hook made from an alloy stick. Anything will do. The basic principle of how I did it.